.full {
  width: 100%;
  height: 100%;
}
html,
body {
  margin: 0;
  padding: 0;
  .full();
}
#app {
  .full();
  .head-nav {
    width: 100%;
    height: 60px;
    .van-nav-bar {
      height: 100%;
      .van-nav-bar__content {
        height: 100%;
      }
    }
  }
  .foot-nav {
    width: 100%;
    position: fixed;
    bottom: 0;
    left: 0;
    height: 60px;
  }
  .body-content {
    overflow: scroll;
    background-color: #f4f4f4;
    height: calc(100% - 120px);
  }
}
